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Finding the Fourth Proportional to 39,774.62, 54,890.39 and 21,871.00

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Solution

The fourth proportional to 39,774.62, 54,890.39 and 21,871.00 is: 30,182.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,774.62 : 54,890.39 = 21,871.00 : x
  2. Step 2: Convert to fraction form
    39,774.62/54,890.39 = 21,871.00/x
  3. Step 3: Cross multiply
    39,774.62x = 54,890.39 × 21,871.00
  4. Step 4: Simplify right side
    39,774.62x = 1,200,507,335.88
  5. Step 5: Solve for x
    x = 1,200,507,335.88/39,774.62
  6. Step 6: Final answer
    x = 30,182.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.